Knot 2.1.0-rc1 crash

I've build Knot 2.1.0-rc1 on CentOS 6. I just tried to start it on a test server with lots of IP addresses, and after starting and loading zones, it crashes.

Here are the lines in the log showing the server starting:

2015-12-22T14:06:00 info: Knot DNS 2.1.0-rc1 starting
2015-12-22T14:06:00 info: binding to interface '193.0.19.191@53'
2015-12-22T14:06:00 info: binding to interface '2001:67c:2e8:11::c100:13bf@53'
2015-12-22T14:06:00 info: binding to interface '193.0.9.1@53'
2015-12-22T14:06:00 info: binding to interface '2001:67c:e0::1@53'
2015-12-22T14:06:00 info: binding to interface '193.0.9.2@53'
2015-12-22T14:06:00 info: binding to interface '2001:67c:e0::2@53'
...
...
2015-12-22T14:06:00 info: binding to interface '193.0.9.126@53'
2015-12-22T14:06:00 info: binding to interface '2001:67c:e0::126@53'
2015-12-22T14:06:00 info: binding to interface '193.0.9.127@53'
2015-12-22T14:06:00 info: binding to interface '2001:67c:e0::127@53'
2015-12-22T14:06:00 info: configured 3 zones
2015-12-22T14:06:00 info: changing GID to '10073'
2015-12-22T14:06:00 info: changing UID to '10073'
2015-12-22T14:06:00 info: loading zones
2015-12-22T14:06:00 info: [.] zone will be loaded, serial 0
2015-12-22T14:06:00 info: [arpa] zone will be loaded, serial 0
2015-12-22T14:06:00 info: [root-servers.net] zone will be loaded, serial 0
2015-12-22T14:06:00 info: starting server
2015-12-22T14:06:00 info: [root-servers.net] loaded, serial 0 -> 2015120100
2015-12-22T14:06:00 info: [arpa] loaded, serial 0 -> 2015122200
2015-12-22T14:06:00 info: [.] changes from journal applied 2015122101 -> 2015122200 (OK)
2015-12-22T14:06:00 info: [.] loaded, serial 0 -> 2015122200

and then it crashes, and I have this in the syslog:

Dec 22 14:06:01 ns1 kernel: knotd[17518]: segfault at 6ef68ae88808 ip 00006ef68ae88808 sp 00007efe65e423b0 error 14
Dec 22 14:06:01 ns1 kernel: knotd[17519]: segfault at 6ef68ae88808 ip 00006ef68ae88808 sp 00007efe65d413b0 error 14
Dec 22 14:06:01 ns1 kernel: knotd[17520]: segfault at 6ef68ae88808 ip 00006ef68ae88808 sp 00007efe65c403b0 error 14
Dec 22 14:06:01 ns1 init: knot main process (17517) killed by SEGV signal